Improvement in machines for laying out mortises



2 SheetsSheet I.

S. W. DICKINSON.

MACHINES FOR LAYING OUT MOR'IISES. N 176,Z87 Patented April 18, I876.

WITNESSES NVENTQR awn/, /w .W %4 Q/g ed l! fi/(e/ ATTORNEYS MPETERS. PHOTO-LITHOGRAPHER, WASHINGTON, D. C.

(/1 2Sheets-Sheet2.

S. W. DICKINSON.

MACHINES FOR LAYING OUT MORTISES.

No.176,287, M Patented April418,1876- I a E 6' g INVENTO R ATTORNEYS Mm PHOIO-LITNGGRIPNER, WASHINGTON, D. C

UNITED STATES PATENT OFFICE.

SAMUEL W. DICKINSON, OF HUMBERSTONE, CANADA.

IMPROVEMENT IN MACHINES FOR LAYING OUT MORTISES.

Specification forming part of Letters Fatent No. 176,287, dated April 18, 1876; application filed May 22, 1575.

To all whom it may concern Be it known that I, SAMUEL W. DICKINSON, of Humberstone, in the county of Welland and Province of Ontario, Canada, have invented certain new and useful Improvements in Machine for Laying Out Mortises; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to that class of implements or machines used for working joinerwork, and is known as a mortise-marking machine, the object and operation of which will hereinafter be more fully described by the aid.

of the annexed sheets of drawings, and letters of reference marked thereon, in which- Fig. 1, Sheet No. 1, is a front elevation of my machine. Fig. 2 is a plan of Fig. 1, Sheet No. 1. Fig. 3, Sheet No. 2, is a sectional elevation of Fig. 1, Sheet No. 1. Fig. 4 is a view of the slides in the marker-frame.

In all, the-same letters refer to the same parts. I

My mortise-marking machine is constructed of a base piece, A, and has two guides, B B, rising therefrom, between which is placed a sliding frame, 0, operated by aspiral spring, S, bar g, and treadle F, and to which a horizontal bar, D, is pivoted in the center thereof. Upon said bar D there is made the long opening or slit h, in which work the markers or guides (0 with the marking-points to. These are tightened up, by the thumb screws ed, in any desired position upon the bar D and in the slot-or opening h,- and for the purpose of strengthening the part of the arm D at h there are provided curved braces b. As before herein mentioned, the arm D is pivoted,

/ and above the said pivoted point is adoubleacting spring, S, with set-screws s s, the use of which will be hereafter explained. The lower part of the marker E, which rests partly upon the base A, is parallel to the arm D, and

has a corresponding groove or slot, h, but longer than in the opposing arm, for the purpose of permitting a stop, a, to be placed. It is also held out by curved braces b b, and the markers are made, as above stated, with points directed upward, toward those on the arm D. They also possess the power of being set in any position along the bar E, as in the case of the arm D. Upon either guide B are placed the adjustable sets e e.

The operation of my invention simply consists in arranging the points a. in a desired position upon the opposing arm D and bar E. That the wood to be marked takes proper position, the side sets 6 e regulate the back, and the end one, o, the ends or length of the piece.

In marking, the arm D is drawn down toward the batch), causing the points a a, in their respective positions, to mark the wood that may be placed between them. This operation of drawing the parts D and E together is performed by means of the foot of the operator pressing down the treadle F, thereby drawing down the bar g, which is connected to slide 0. When the foot of the operator is removed the spring S lifts the slide 0 into former position.

It is plainly shown. that the sets a and e e are adjustable in their lengths; and should the piece of wood be of irregular form, the pivoted arm D enables the points to adjust themselves for markingthe work.

Having thus described the construction of my invention, what I claim, and desire to secure by Letters Patent, is

In a machine for laying out mortises, the pivoted arm D, provided with a double spring,

S S, substantially as and for the purpose described.

In testimony that I claim the foregoing as my own invention I aflix my signature in presence of two witnesses.

SAML. W. DIOKIN SON. Witnesses:

HENRY NIDLE, J OHN SCHNEIDER. 

